Wire-stitching or stapling machine.



A. H. MAYNARUV WIRE STITCHING ORSTAPLlN-G MACHINE.

APPLICATION FILED DEC-18,1916.

Patented Apr. 29'

4 SHEETS-SHEET l.

w uliiuilnr INT/ENTOR ATTO NE A. H. MAYNARD.

WIRE STITCHING 0R STAPLING MACHINE. APPLICATIONTILED 050. I8. ms.

Patented Apr. 29, 1919 4 SHEETS" SHEET 2- i {7V 4 Z J ji 2? p l NVENTO TT'ORNEY 4 SHEETS-SHEET 15.

x 479 I INVENTO Patented Apr. 29,1919.

W A 'TQQNE A. ,H. MAYNARD. WIRE STITCHING 0R STAPLING MACHINE.

APPLICATION FILED DEC-18.19%.

A. H. MAYNARD. WIRE STITCHING OR 'STAPLING MACHINEDQ APPLICATION FILED DEC. 18.1916.

- Patented Apr. 29, 1919,

4 SHEETS SHEEI .4,

v/? MA u u .-n.- w. L &

UNITED STATES FATENT OFFICE.

ARTHUR H. MAYNARD, or WARWICK, RHODE ISLAND, ASSIGNOR TOBOSTON WIRE s'rITcHERco PANY, OF PORTLAND. MAINE, A CORPORATION on MAINE.

WIRE-STITCHIN OR STAPLING MACHINE.

Application filed December 18. 1916.

To all whom t'mag concern Be it known that I. ARTHUR H. MArNARD, a citizen of the United States. residing at \Varwick, in the county of Kent, State of stapled. Further objects of the improve ment are to simplify and render more efficient the whole stitchin nechanisnr and to adapt it fora wider range of work and more convenient operation.

The manner and means for carrying out the improvements are fully described in the following specification, illustrated by the accompanying drawings, in which like reference characters designate like parts. In the drawings Figure 1 is a side elevation of a stitchingmachine embodying my improvements;

Fig. 2, a, detail view of the adjustable mounting for the drive-shaft of the machine;

F 3, an enlarged, sectional view of the stitcher-head illustrating the essential elements of the staple-forming and driving mechanisms and showing their relation to Fig. 4., a detail view, of the same;

Fig. 5, a front elevation of the operatingmeans for the reciprocating bender-bar and staple-driver, showing these latter elements approachii'ig the upper end of their stroke;

Fig. (i, a similar view showing the, benderbar at the upper end of its stroke and the driver at the commencement of its downward stroke;

Fig. 7. a similar View illustrating the bendenhar at the end of .its downward stroke and the driver approaching this end oi. its movement;

Fig. 8. a similar view showing both the bender-lair and driver in'lowermost position iiftlie act of con'lpletiug the clenching of the staple through the work;

Specification of Letters Patent.

Patented Apr. 29, 1919.

Serial No. 137,521.

Figs. 9, 1O, 11 and 12, plan views of the stitcher-head showing the arrangement for adjusting it in diflerent positions on the machine; I 1

Fig. 13, an enlarged, plan view of the adjustable support for the elencher-block; and

Figs. 14, 15 and lo, views showing different methods of stitching a seam.

Referring first to Fig. 1, my improved mechanism is here shown as applied to a vertical type of stitcher-head such, for instance, as that described in U. S. Patent No. 970,461, granted Sep. 20, 1910 to T. A. Briggs. It is to be understood, however, that my improvements are adapted for use withvarious other forms of stitcher-mechunisms and might also be employed on different machines of a similar mature. -In Fig. 1, A designates the main frame of the machine, which is usually mounted on a pedestal or column, not here shown, and is formed with the overhanging, horizontal arm A. Attached to the upright portion of the frame A below the arm A is a horizontal work-support or clencher-arm C which carries the staple-clenching devices at its end. Adjustaihly mounted on the outer end of the upper arm A 'is the stitcher-head or bonnet B which carries the staple-forming and driving devices illustrated in detail in the enlarged, sectional view, Fig. 3. As

shown in Figs. 9, 10 11 and 12, the stitcherhead 13 is constructed in the form of a rectangular casing adapted to be attached to the end or" the arm A in different positions to vary the direction of application of the staple tothe work.

The machine is driven from a pulley P clutch-device R, the latter not here shown or described in detail as it may be of any usual construction. The shaft S is journaled in hearings in a hanger 1-1 which extends through the arm A and is mounted to proride for angular adjustment in a vertical plane fora purpose as later explained. Referring particularly to Fi 2, the hanger .H is formed at its end witha convex bearing ring 2 fitted to the bore of a hub 3 at the rear end of the arm A. A stud 4;, screwed through one side of the hub 3, is formed with a projection or teat 5 which enters a slot 6 in the side of the hearing-ring 2 to hold the hanger H from longitudinal movement while allowing it to rock slightly in connected to a drive-shaft S by a suitable be stapled.

g iirgthe bore of the hub 's arrangement the forward end uger may be tilted upwardly or i to a. slight extent audits posigulated by two adjusting-screws 7,

'5'. The screws 7 are screwed through bosses on the upper and lower sides of the arm A. with their ends bearing against the top and bottom of the hanger H. By loosening one screw andsetting up the other the forward end of the hanger may be raised or lowered as required. The purpose of this adjustment is to provide for varying the position of the drive-shafts and itsconnected operating-inechanism for the stitching-means so that the latter may be adjusted in relation to the work-support and clencher-devices in ac-.

the driverD,and a staple-former or bender.

bar F arranged to reciprocate independently of the other sliding parts. The dr1v1ng-bar D is constructed in the form of a rectangular plate 10 havingan enlargement 11 at its top and provided with splines 12 on its edges fitted to slide in vertical grooves 13 in the sides of the bonnet B, see Fig.3. The benderloar F is likewise of rectangular, plate-like construction with splines f, f on its edges fitted to slide in the grooves 13 in the sides of the bonnet B. Mounted to slide in the .slotted, front face of the bender-barF, see

Fig. 4:, is the driver-bar D which is coupled to the driving-bar D at its upper end by a tongue-and-groove connection shown at 14:. Fitted to the front of the-driver-bar D at its lowerend is the driver D which consists merely of a flat plate of hardened metal, secured in place through any suitable means. The opposite, vertical edgesof the driver D are thinned down or chanifered off to adapt them to slide in grooves 15 formed in the sides of theslot in the bender-bar F, see Figs. 4' and 5. In this, manner the drWer-bar D and itsconnected driver D are held in place on the front of the bender-bar F while being adapted to slide in relation thereto, the construction of these parts being similar to that shown and described in the patent to Briggs, previously referred to.

As illustrated more particularly in Figs. 4 and 5, the web portion 7' of the bender-bar F is cut away at the bottom, at the rear of its slotted front, forming two parallel, depending legs or extensions 16, 16. The legs 16 are adapted to straddle a cylindrical anvil 17,

see Fig. 3, held in a bearing 18 on the front of, the bonnet B, when the bendcr-bar carried, downwardly in the guiding-grooves 13. The anvil l7 isarranged to rotate and to slide arially in its bearing 18 to cooperate with the bender-barf to form the staples in the following'manner: The inner endofthe anvil 17 is beveled off on opposite sides and formed witha 'cr'oss slot 19 for holding the wire to be bent into the staple. The wire feeds down through the slot 19 from above and a length is severedfroin the main strip, through the operation of suitable devices not herein illustrated, but which are shown and described in detail in the patent above referr -l to. After the wire has been out off in a length appropriate to the size of staple required, the anvil 17 is rotated to bring the severed wire into horizontal position beneath the bender-bar F. Now, as the bender-bar descends the ends of its legs 16 will strike against the ends of the length of wire projecting beyond the sides of the anvil 17, causing the wire to be bent downwardly to form the opposite narallel legs of the staple. As the bender-bar F continues to descend. after completing the formation of the staple, the lower edge of the driver D will engage the beveled end of the anvil 17 to force it back in its bearing 18. As the anvil 17 is thus retracted it releases the staple from its crossslot 19, while the legs of the staple are held. in the grooves 15 of the bender-bar F. The staple is maintained in this position by a supporter 20 hinged on the back of the benderbar F and having an inclined toe Q'ladapted to enter between the legs 16 of the bender-bar F. As shown in Fig. 3 the staple-supporter 20 is adapted to swing into position between the legs of the staple as the bender-bar F descendsthrough the lower end of its travel, being guided by a cam-block 22 over which a pin :23 rides. After the staple is thus formed. and while it is being held in the 'bendenbar F, with the bottom of the; latter pressed against the work, the driver-bar D descends and forces it down 'through the work in the usual manner. As the loweredge' of the driver-bar D comes into contact with the inclined front of the supporter QO it- 1 forces it back to allow the; staple to slide off from its too 21. 3

After the staple has been driven through the work and set in place by clenching overits ends, in the manner as hereinafter more fully explained, the bender-bar F and driverbar D start to ascend and as theformer moves upwardly the staple-supporter 20 travels with it as follows: When the bender-bar F is at the lower end of its stroke during-the setting of the staple the supporter 20 is forced back by the driver D? sliding across its inclined, front face and is held in its re- I tracted position as the bender-bar and driver ascend together. As before explained the supporter is guided into its forward position by the aetion of the pin 23 riding over the inclined face 24 of the cam-block 22, see Fig. 3, two pins being usually provided on the opposite sides of the sup-porter to cooperate with two cam-blocks 22 on either side of the bonnet B. During this operation the pins 23 are maintained in engagement with the camblocks by the action of a plunger-pin 25 slidably mounted in a bore 26 at the upper end of the supporter 20, under the tension of a spring 27. The plunger-pin 25 bears against the end of a second plunger 28 slidably mounted in a block 29, which latter is connected to operate the bender-bar F as next described.

The above described reci procating-elements of the staple-forming and driving devices are of substantially the-same construction and arrangement as usually .employed in machines of this type and as disclosed in the patent to Briggs, before referred to. -My present invention resides in the improved means for operating these elements of the stitching-mechanism and particularly for adapting them to be connected to their operating-means indifferent positions to provide for varying the direction of application of the staple to the work as next described: Referring still to Fig. 3, the driving-block or slide 29 is coupled to the benderbar F through a yielding connection embodied in the sliding plunger 28. As shown most clearly in Fig. 4, the plunger 28 is mounted in a vertical bore 30 in the block 29 with a compression-spring 31 hearing against its upper end. Driven into the side of the plunger 28 is a stud or pin 33 arranged with its head 34 fitted to slide in a slot on the front of the block 29, and formed with a teat or projection 36 engaging a hole 37 in the upper end of the bender-bar F. The pin 3% is thus adapted. to retain the plunger 28 in position in its bore 30 while allowing it to slide to a slight extent against,

the action of the spring 31. As before stated the block 29 serves as the drivingelement for the bender-bar F and the co action of these parts is as follows: As the slide or block 29 moves downwardly the pin 33 in the side of the plunger 28 causes the bender-bar F to move with it. As before explained, the bender-bar F is carried down against the work before the staple is driven therethrou'gh and in this manner is caused to act as a presser-foot to holdthe work in place. It is desirable, therefore, that the bender-bar act on the work with a thin pressure, yet it must also be yieldable to a slight extent to compensate for irregulari ties or variations in the thickness of the stock being operated upon. To provide for this the connection between the bender-bar F and its operating slide 29 is made resilient, as above described. the spring 31 allowing the plunger 28 to slide upwardly in its-bore while maintaining the bender bar pressed the descent of the slide 29.

The means for connecting the slide 29, its coupled bender-bar F, and the associated driving-bar D to be reciprocated from the crank 8 on the drive shaft S comprises essentially a system of compounded levers or links as next described: Journaled on the wristpin 9 of the crank 8 is a link 38 to the end of which i pivotally connected a second link 39 by means of the pin 40, see Figs. 3 and 5. The link 88 takes the form of a bell-crank, being provided with an offset portion having a boss 41 reinforced by a rib 42, and driven into the boss is a pin 43. The projecting end of the pin 43 is adapted to engage a suitable hole in the slide 29 for the bender-bar F and at the upper end of the link 39 is a similar pin ll arranged to engage a hole 46 in the enlarged offset portion of the driving-bar I). Through this arrangement the bender-bar F and driver-bar D" are connected to be driven from the crank-shaft S with a differential movement as more fully explained hereinafter in connection with the progressive views. Figs. 5 to 8.

In Figs. 1 and the stitcher-head or bonnet B is shown attached to the arm A in such position that the staples will be inarrangement is of advantage, particularly in stapling through wood to prevent following the grain which tends to split the stock. To allowfor this variation in the positioning of the staples in relation to the direction of feed of the work, I have provided for ad justing the stitcher-head or bonnet B to different positions on the frame of the machine, while adapting the stitching-mechanism for connection with its operatingineans in its different relations. In the plan views, Fig. 9 shows the head or bonnet 3 attached to the front of the arm A with the staple-forming and driving devices set in alinement with the axis of the driveshaft S; while in'Fig. It) the head is turned at right-angles tobring the stapling-devices offset 'to the shaft S; and in Fig. 11 the head is turned at an angle of forty-five degrees to adjust the stapling-means to an oblique position. As shown in Fig. 3 the head B is attached to the front of the arm A-"by means of bolts I), Z) inserted through the of alinement" with the flanges a, d and screwed into the crossfl the head is set-obliquelythe bolts 6 are} inserted thronghi the angularly arrzui'ged holes in a casing 'Kfl as shown in Fig. ll,. the oblique, dotted line representing the an gularly-ofi set side of the casing against which the heads of the bolts abut.

For connecting the bender-bar F and driving-bar D with the link-motion on the crank-shaft S, when the head is adjustedout shaft, I employ the following described means: Referring first to Figs. 4 and 10, two blocks or cleats 47, 48 are bolted to the bender-bar F and driving-bar D in offset relation to their rear faces. For this purpose I make use of the same holes 45 and 46 with which the pins 43 and 4.4 on the links normally engage. Referring particularly to Fig. 4, it will be noted that the inner ends of these holes are tapped to provide threads for receiving the bolts, the position of the blocks 47 and 48 being illustrated by dotted lines in this View. For connecting the bender-bar and driving-bar D in their oblique relation to the shaft s shown in Fig. 11, an angular form of cleat 49 is employed with longer bolts 50 reaching into the holes 45 and 46,

see also Fig. 4. With the latter arrangement the pins 43 .and44 will engage the angular holes 51-on the corner of the blocks as illustrated in the plan View, Fig. 11. In Fig 11, I have also illustrated the modified form of casing K, which is fitted to partly inclose the head B .to join it to the front of the arm A in the same manner as the casing K, is

employed with the parallel arrangement of the head shown in Fig. 9. The casings K,

K fitaround the side of thebonnet B to hold them in place when the bolts 6, b are tightened'as shown in Figs. 10 and 11.

Referring now to-Figs-. 1 and 13, the arm C which means is mounted on the frame A to allow for its lateral adj ustmentin accordance with the different settings of the head B. As here shown the rear end of the arm C eX- tends through openings 0, c in the'front and rear walls of the frame A and is held in place by the cross bolts 53 and 54. The rear bolt 53 extends through a hole 55 in, the arm 0 which ischamfered on its opposite sides to allow the arm to rock laterally, and the forward bolts 54, 54 have suiiicient clearance in the holes'56, 56 of the frame Ato allow for angular play. At its rearend the arm G is formed with lugs 57, 57. on either side which engage the opposite sides of the opening 0 in the frame A .to hold the arm from while allowing it to rock laterally at its forward end.

1 supports the staple-clenching side play' asagna I bolts 54 are threaded into the arm C so that when they are turnedthey act to adjust the, front end ofthearm'tio one Screwed through th e opposite sides of the Assh Wn in Fig. l3the forward side orthe other. i

frame-arm are .fo urset-screws 58,58, seealso. Fig. 1, wh ch may .bQ.-21l]11StG(l, 1I1,PQSl-;

tion to serve. a's 'stopsio movement of the. arm. (Carried on the top; of the arm Cisa barC to which is; attached the clencher-blocks 59' and 60.- These consist merely-of hardened metal plates .fitted' to slots in theopposite ends of the bar and secured in place by any suitable means, such as the set-screw 61 shown in Fig. 3. At one end of the bar Q the block 59 is inserted in. a slot 62 extending transversely of the arm C while at theoppoSite end ,the blo ck 60 is set longitudinallyof the baratfa slight inclination to itsv side. The bar Otis secured to the arm C byinserting its inner end under 'a slotted clamp member 63 within bolt 64 screwed up through the arm to engage a threaded hole in its outer end, see Fig. the

dowel 65 serving to locate it in position.

When the head B is attached to the arm "A in the position illustrated in Figs. 3 and 9,

to insert the staples lengthwise of the seam, as shown in Fig. 14 .the. bar C is attached to the arm. Gwith'the transverse clencheriblock 59 at its outer 'end in alinement with and beneath the staple-former F and driver D lVith this arrangemcnt' the arm G'is adjusted to central position on the arm A or in-parallel alinement with the drive-shaft S. When, however, the head B is adjusted to the position shown in Fig. 10 to set the staples crosswise of the seam, as indicated in Fig. 15, the position of the bar O is reyersed with the longitudinal clencher-block 60 at the outer end of the arm C, seeFig. 13. ith this latter arrangement of the head B the stitching-mechanism is thrown out from alincment with the shaft S so that the arm C must be adjusted to one side to bring the clenchenblock 60 into proper relation with the stapling-devices. This is accomplished by swiiwing the arm laterally as shown in Fig. 13 through the means of the adjustingscrews 54, 54. lVith the oblique adjustment of the head B as shown in Fig. 11 a different form of bar .6 is employed with the clenoher-block set into its end at the proper inclination toaline with the staple-driver, but otherwise the arrangement is the same.

i eferring once more to Figs. 3 and 4, the head or bonnet B carries a face-plate limit; the. lateral Oon its front arranged to be adjusted vertiing'the wire down to the anvil l7 and cut" ting it oftin lengths appropriate to the length of staple required. These parts are described in' detail in the Briggs patent beplained. In adjusting the position of the staple-forming and driving devices in accordance with the'thickncss of the work to be stapled it is of course necessary to adjust the wire-feed and severing-means to the same degree. As before explained, the operative position of the stitching-mechan-ism is adjusted by raising or lowering the forward end of the drive-shaft S with which the bender-bar F and drivingbar D are connected. To provide for adinsting the wire-feed and severing-means at the same time, and'in'the same proportion, I

have arranged :a connection between the tilting hanger H and face-plate O as next described: Connected to. the front end of the hanger at is an arm or link 67 formed with a transverse hub 68 at its upper end. Driven into the outer end of. the hub 6'8 isa stud or pin 69 adapted to engage a hole 70 in a block 71 which is secured to the back of the face-plate The block 71 is formed with splines "72 [fitted to slide in the slots 13 on the sides of the head Band. when the hanger H is moved up or down alter the method of inserting the staples,

the block 71 is coupled with the arm 67 through the means of an auxiliary block 73 indicated by dotted lines in Fig; This takes substantially the same form as thedriving-blocks 47 and T8 for the hender-bar l and driving-bar D, being secured to the block 71 by a bolt '74. In this position the stud 69 will engage with a hole 75 on its end when the position of the head is altered as illustrated in Fig. 10, and for the oblique adjustment of the head an angular block is employed similar in form to'the element 49 illustrated in Fig. 11.

Having now described the construction and arrangement of my improved mechamsm 1n detail, lts method of operation Wlll 1 next be explained: The head B is attached to the arm A in any one of its adjusted positions, as shown in Figs. 9, 10 and 11, and the clencher-bar G is secured to the work-support or arm C with the appropriate clencher-block in place in accordance with the style of stitching to be performed. The arm 0 then adjusted laterally by means of the devices shown in Fig. 13 to bring the clencher-block into alinement with the staple-driver, in the manner as before explainecl. The stapling-devices are next adjnsted vertically in relation to the work support, in accordance with the thickness of the stock to be stapled, by regulating the position of the drive-shaft hanger H. This is accomplished by adjusting the handscrews 77, 7 and the positioning of the hanger H serves to adj-ust the faceplate O and its associated wirefeed L and severing devices M in accordance with the setting of the staple-former and driver as before explained. The machine'is now ready to 'operate and when the driving-pulley P is connected with the shaft S, bymeans of the "clutch ll, the crank 8 'on'the forward end of the shaftwill be rotated to operate the stitching-mechanism follows: Referring to Fig. 6, the crank 8 is here shown in ver tical position with the wrist-pin 9 at the upper end of its stroke, and the staple f-ornier or bender-bar F, connected thereto by the link 38, is therefore at the top of its stroke. The driving-bar D is also at ap proximately the upper limit of its movement, although it will be raised to a very slight extent farther as the crank 8 turns inthe direction indicated by the arrow 2 owing to the angular relation of the bellcrank 38 to its link As the crank '8 starts to move downwardly in this direc tion the b'enderbar F immediately com -mences its descent and the driving-bar D,

after a very brief interval, starts to follow it. The movement of the bender-bar F and driving-bar D is at substantially the same rate of speed, as they descend toward the work, but as the bender-bar comes into contact therewith the speedof the driving-bar is accelerated. T hat is to say, after the bender-bar F has been brought down against he work as shown in Fig, 7, the driving bar D will begin to descend with an accelerated rate of movement, due to the opposite, turning movement of the bell-crank 38 about the axis of the pin 43. As the crank 8 approaches the vertical plane of its axis, or throws across the center?" the bender-bar slide or driving-member 29 will be moved only to a slight extent downwardly, and during this latter movement the legs 16, 16

- of the bender-bar F will bear down on the 116 work W, see Fig. 7, and will be pressed firmly thereagainst. t is at this point that the plunger 28 comes into play, acting to compress the spring 31 in the slide 29 as the crank 8. crosses center,see Fig. 4;. That is 120 to say, the spring31 and plunger 28 will allow the bender-bar to yield against the action of its slide 29 while still maintaining its legs 16, 16 hearing against the work with the action of a presser-foot as before explained.

As the bender-bar F slides downwardly past the forming-anvil 17 it acts to bend down the ends of the severed length of wire held therein to form the opposite, parallel legs of the staple, in the manner wellknown I in the art. lVIeanwhilegthe driving-bar D is following the bender-bar F in its descent and the driver D carried by theaconnected driver-bar D will act on the anvil 17 to of stock to. bestitched together. As the legs of the staple are thus driven through the work they meet the clencher-block 59 which, as shown in Fig. 7, is formed with indentations on its top adapted to bend the ends of the legsover as illustrated in Fig. 8. In this manner the staple w is clenched through the work W while the bender-bar F remains held thereagainst under the pressure of the plunger-spring 81 as before explained. \Vhen the clenching operation has been completed the crank 8 will have crossed center into the position illustrated in Fig. 8 and at this point the slide 29 will have been car ried upwardly until the plunger 28 is,

That is to forced to the limit of its throw. say, the spring 31 will have maintained the plunger with its stud 33 acting on the bender-bar F to hold it against the work, but after the slide 29 has been moved upwardly to a slight extent it will act to raise the bender-ban. As the crank 8 continues its throw the bender-bar F is raised by the action of the link or bell-crank 38, but the driving-bar D will dwell for an instant at the lower end of its stroke. In other words, the bender-bar F will start to move up wardly before the driving bar D commences its upward stroke and this causes an effect as follows: As the bender-bar moves away from the work it leaves the driver D still.

bearing against the top of the staple 00 with an instant of dwell which insures that the staple shall be pushed out clear of the grooves 15 in the legs 16, 16. This provision is important as guarding against the clogging of the staple-former or bender-bar F by malformed, distorted, or bent staples.

Should the staple be improperly formed through insufficient feed .of the wire, or should it become bent, twisted or fail to perforate the stock properly, it cannot be come jammed in the bender-bar F. In brief, the staple-driver D? acts as a clearer for the grooves 15 in the bender-bar -F to.

eject imperfect staples therefrom to prepare it for its neXt operation.-

After the above action takes place, that is the relative downward displacement of the staple-driver D with respect to the bottom of the bender-bar F, the staple-driver D starts to ascend with the bender-bar but at a faster rate of speed. As the link 39 starts to carry the driving-bar D upwardly the turning movement of the bellstaple-former and staple-driver as required to form and drive the staple and return the parts to first position. It will be observed that my improved mechanism for perform ing these functions is extremely simple,

compact, and efficient in operation, and furthermore that it provides for the adjustment of the staple mechanism to different positions as required.

Various modifications might be made in the form and construction of the parts of my improved device without departing from the spirit or scope of the invention; therefore, without limiting myself to the eXact embodiment shown and described, what I claim is v 1.. In a wire-stitching or stapling machine, the combination with a reeiprocable staple-former for bending wire into staples, of a reciprocable driver fordnserting the staples through the work, a rotatable shaft, a bell-crank lever operated from the shaft to actuate one of the reciprocable members, and means connecting said bell-crank-lever .to the other member to reciprocate the same.

bender-bar for formingthe staples, of a re ciprocable driver for cotiperating with the bender-bar to drive the staples through the work, a rotating crank, a link connecting the crank to reciprocate the bender-bar, and

a second link pivoted on the first link and connected to reciprocate the driver from the motion of the crank. V

4. In a wire-stitching or stapling machine, the combination with a" reciprocable staple-former for forming the staples from wire fed thereto, of a. reciprocable driver for driving the staples through the work, a rotating crank, a bcll-crank-lever connected with the crank to reciprocate the stapleformer, and means to connect the bell-cranklever with the staple-driver to reciprocate the latter with a differential motion with respect to the staple-former.

5. In a wire-stitching or stapling machine, the con'lbination with a staple-former for forming the staples from lengths of wire, of a staple-driver for inserting thestaples through the work, a rotating crank,

a link connecting the crank to reciprocate the staple-former, and a second link pivoted on the first link on an axis offset from the point of connection of the latter with the staple-former and connected to reciprocate the staple-driver with a differential motion with respect to the staple-former.

6. In a Wire-stitching or stapling machine, the combination with a reciprocable' rocate the staple-driver, said staple-former and staple-driver adapted to be connected with thelinks in different positions of angulaikadjust-ment in relation'to the crank to vary the direction of application of the staples to the work. I

7. In a wire-stitching or stapling machine, the combination wi-ththe main frame thereof, of stitching-mechanism for forming the staples and insertingtliem through the work, said stitching-mechanism adapted to be attached to the frame of the machine in different positions of angular relation to the work, 'a power-operated shaft, and a crank at the end of said shaft for operating the stitching mechanisni, said stitchingmechanism adapted to be connected to the crank in whatever position it is adjusted.

8. In a wire-stitching or stapling machine, the combination with a stitcher-liead carrying stitchingmechanism for forming the staples and inserting them through the work, said'stitcherhead adapted to be adjusted in angular relation to the work, of a drive-shaft rotatable in fixed bearings,

and a bell-crank-lever operated from said shaft to drive the stitching-mechanism, said stitching-mechanism adapted to be. con? nected with the bell-crank-lever in the different positions of adjustment ofthe head.

9. In a, Wirestitching or staplingmachine, the combination with the machine frame, of a driyeshaft rotatable in bearings on the frame, a stitching-mechanism adapted to be attached to the'frame in different angular positions i'nrelation to the driveof the machine, of a power-actuateddriveshaft journaled in bearings on said frame, a crank on the shaft, a stitcher-head attachable to the frame in different positions of angular adjustment in relation thereto, stitching-mechanism. carried by the head, and means operated from the crank to actuate the stitchiiig-mechanism, said stitching mechanism being adapted for connection with said means in the different positions of adjustment of the head.

11,111 a wire-stitching'or stapling machine, the combination with the -machine frame, of 'a drive-shaft journaled in bearings in said frame, a crank on said shaft, ahead attachable to the framein different positions in angular relation thereto, stitching-iiiechanism carried by said head, and

.chine, the combination with a stitchingmechanism adapted foradjustment in different angular positions in relation to'the work, of a rotating crank for operating the stitching-mechanism, means operated from the crank to reciprocate the stitching-mechanism, and auxiliary extension-means for connecting the reciprocatiiig-means with the stitching-mechanism when the latter is adjusted in angular relation to the crank.

13. In a wir'estitching or stapling ma-- chine, the combination with a power-operated drive-shaft, of a stitching-mechanism adaptedfor adjustment in offset relation to the shaft, operating-mechanism for the stitching-mechanism connected to be reciprocated from the drive-shaft, and auxiliary means for connecting the stitchingmeclianism to the operating-mechanism in its ofiset relation to the drive-shaft.

14. In a Wire-stitching or stapling machine, the combination with a reciprocable staple-former and a r'eciprocable stapledriver, of a rotating crank, means operated from the crank to reciprocate the stapleformer and staple-driver, means for connecting the reciprocating-means directly with the staple-former and staple-driver,

' relation thereto.

' 15. In a wire-stitching or stapling machine, the combination with a reciprocable staple-former and a reciprocable stapledriver, of a rotating'crank, links connected with the crank to be reciprocated thereby, pins onthe links for connecting them to operate the staple-former and staple-driver, and auxiliary blocks engageable with the pins to connect them with the staple-former and staple-driver when the latter are set in offset relation to the crank.

. 16. In a wire-stitchingor stapling maa plunger slida'blein said bore andhaving means connecting it with the staple-former,

a spring in the bore acting against the plun ger, and means to limit the sliding movement of the plunger under the action of the spring. 1 I

. 17. In a wire-stitching or stapling 'machine, the combination'with a sli-dable staple former, of a slide for reciprocating the staple-former, and a'resilient connection between the slide and staple-former comprising a. plunger in the slide,'a spring acting against said plunger; and a pin on the plunger engaging a slot in the slide to limit the extent of movement of the plunger, said pin also engaging a hole in the staple former.

18. In a wire-stitchingor stapling machine, the combination with a frame having a vertical column surmounted by a. horizontal arm, of a, stitcher-head mounted at the outer end of saidarm, a work-support comprising a horizontal arm inserted through openings in the vertical column, means for pivoting the work-support to adapt it to swing laterally between the sides of the front opening in the column, and set-screws for holding the worl -support against lateral movement after it has been adjusted in posi opening in the column to provide a pivot 40 hearing for the support, and means for adusting the work-support across the opening at the front of,the column to set it in position in relation' to the stitcher-head.

20. In a wire-stitching or stapling machine, the combination with the machine frame, of a stitcher-head adjustable on the frame in angular relation thereto, stitching I mechanism carried by said head, a worksupport mounted on the frame below the,

stitcher-hcad, and a reversible clencher-bar detachably. mounted on the work-support and carrying oppositely-arranged clencherblocks at its ends. I

21. 'In a wire-stitching or stapling machine, the combination with the-machineframe having a horizontal arm, of a shatt hanger swiveled-at one end in a bearing in the arm, a drive-shaft journaled in said hanger,- a stitching-mechanism mounted on the front of the arm and connected to be driven from the drive-shaft, and manuallyoperable means for raising and lowering the front end of the hanger to adjust the stitching-mechanism vertically in relation to the work;

22.'In a wire-stitching or stapling machine, the combination with the machine frame having a horizontal arm, of ashafthanger swiveled at one end in a bearing in thearm, a drive-shaft journaled in said hanger, a stitching-mechanism mounted on the front of the arm and connected to be driven from the drive-shaft, and handscrews in the forward end of the arm engaging the sides of the hanger to maintain it in position while allowing it to be adjusted vertically to regulate the position of .the stitolling-mechanism in relation to the work.

23. In a wire-stitching or stapling machine, the combination with a reciprocable bender-bar for forming the. staples and guiding them against the work, of a reciprocable staple-driver for inserting the staples through the work, a crank-shaft, and a linkmotion connected therewith for reciprocating said benderbar and staple-driver with a differential motion with respect to each other whereby the benderbar is withdrawn from the work in advance of the stapledriver in the manner and for the purpose substantially as described.

In testimony whereof I affix my signature.

ARTHUR H. MAYNARD. 

